JP2015531633A - Catheter using optical fiber and camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera for illumination and an optical fiber for proof, and an optical fiber and a camera which can be treated while confirming the inside with a camera under irradiation of light by the optical fiber. According to the present invention, a camera and an optical fiber, a wire and a hole for injecting a drug can be formed in the shaft, and the diameter of the shaft can be minimized. The camera, fiber optic, and drug infusion tube tip are also driven together to ensure accurate internal photography, light irradiation, and drug injection, even if the camera does not have a separate connector. It is tightly fitted and can be kept fixed by the wire. When connecting, attaching the camera, optical fiber, drug infusion tube to the cap, installation becomes easy, By allowing the tip to be separated, the cap can be easily separated. [Selection] Figure 5

Description

The present invention relates to a catheter, and an optical fiber that incorporates a camera for illumination and an optical fiber for illumination, and treats the patient while confirming the inside with the camera under irradiation of light by the optical fiber. The present invention relates to a catheter using a camera.

 A catheter, in a broad sense, refers to a tube that is inserted into the body for treatment.

As such a catheter, in order to confirm the state of the internal organ, a catheter like an endoscope provided with imaging means such as a camera for observing the inside, a drug supply tube for supplying a drug to the internal organ There are various types of catheters, catheters that irradiate internal organs with lasers to burn and remove tumors, and rotary catheters with bent ends for the treatment of lumbar disc prolapse.

As a technique related to such a catheter, FIGS. 2A and 2B on pages 4 and 5 of a “Steerable catheter” (US Patent No. 6,146,355, Patent Document 1) include a tube for supplying a drug, There is disclosed a technique provided with a drive device that includes a wire for rotating a shaft, and rotates the shaft by lifting the wire.

FIG. 2 shows such a catheter of Patent Document 1.

In such a technique, as shown in FIG. 1, the doctor in charge of the operation incises the side of the patient's coccyx and steers it using a drive device while moving the shaft of the catheter 1 to the patient's spine. Insertion is performed to supply a drug to a desired point, or the distal end of the shaft is rotated to the left and right to stimulate the prolapse of the intervertebral disc and perform treatment.

However, in such a case, there is a problem that the risk of erroneous operation is high because the size and form of the passage into which the shaft 2 is inserted differ depending on the movement of the patient and the condition of the body.

Therefore, in addition to the catheter provided with the shaft rotated by the wire 3, an endoscopic catheter for confirming the internal state is separately inserted, but the shaft moves by inserting two catheters in a narrow space. This makes it difficult to rotate the distal end of the treatment catheter to give a stimulus or to supply a drug.

As a technique for solving such a problem, FIG. 5 on page 4 of “Endoscope for direct visualization of the spine and epidural space” (US Patent Publication No. 5.396.880, Patent Document 2) shows a shaft. There is disclosed a catheter provided with a hole for inserting an optical fiber 4 for illumination, a hole for inserting a camera, and a hole for inserting a wire for rotating the tip of a shaft.

In FIG. 3, the shaft cross section of the catheter of such patent document 2 is shown.

However, in such a technique, when forming up to a hole for injecting a drug, a minimum of five holes must be formed in the shaft, so that the diameter of the shaft increases, and thus the diameter of the shaft increases. However, there is a problem that it is unsuitable for a treatment in which a shaft is inserted into a narrow space as in the treatment of disc prolapse.

Also, there is a problem that the camera built in the process of bending the tip of the shaft due to the movement of the wire becomes unable to photograph the inside while moving together properly. To solve such a problem, the camera However, it is necessary to provide a connecting tool for connecting the shafts, which is inconvenient because the diameter of the shaft also increases.

US6,146,355 (2000.11.14)

The catheter using the optical fiber and the camera of the present invention is made to solve the above-mentioned problems, and has a hole for injecting the camera, the optical fiber, the wire, and the drug in the shaft. Forming and minimizing the diameter of the shaft.

In particular, the camera, the optical fiber, and the tip of the drug injection tube are provided, and the tip of the camera, the optical fiber, and the drug injection tube is the same by driving the wire by inserting the wire into the cap. It is to drive together so that internal imaging, light irradiation, and drug injection are performed accurately.

Moreover, even if the camera does not have another connecting tool, the camera is firmly fitted to the cap and maintained in a fixed state by a wire.

In addition, the camera, optical fiber, and drug infusion tube are connected to and attached to the cap, thereby facilitating installation.

In addition, it exists in making it easy to isolate | separate a cap by comprising the front-end | tip of a wire so that isolation | separation is possible.

In order to solve the above-mentioned problems, the catheter using the optical fiber and the camera of the present invention has a cylindrical shaft having a hollow portion formed in the inside along the longitudinal direction and made of a flexible material; A head portion having the same size as the outer diameter of the shaft and a head portion integrally connected to one side of the head portion, the outer diameter having the same size as the inner diameter of the shaft, and the inner circumference of the shaft The insertion portion is fitted to the surface, and the cross-sectional shape is “U” -shaped from the end of the head portion to the end of the insertion portion, and is recessed toward the center of the insertion portion. A camera insertion groove with a depth of 1/2 to 2/3 of the diameter of the insertion part is formed on the basis of the diameter of the insertion part, and both ends communicate with the outer peripheral surface of the insertion part. It communicates with the camera insertion groove and forms a straight line across the center of the insertion portion. In addition, a wire insertion hole located away from the end of the head portion is formed, and a wire guide groove recessed inward is formed from both side ends of the wire insertion hole to the end portion of the insertion portion, The cross-sectional shape forms a “U” shape from the end of the head portion to the end of the insertion portion, and the illumination insertion groove and the injection tube insertion groove that are recessed inside are formed separately from each other. A cap that is provided through the wire insertion hole, and is formed along the wire guide groove while being connected to the penetration portion, and the outer peripheral surface abuts on the inner peripheral surface of the shaft, A wire having a longitudinal portion spaced apart from the inner peripheral surface; inserted into the camera insertion groove, with one side end aligned with the end of the head portion and the other side not reaching the wire insertion hole And one side of the outer peripheral surface is inserted into the camera. A camera abutting on the inner wall surface on the center side of the insertion groove; a camera cable connected to the camera and formed smaller than the diameter of the camera and forming a wire mounting space with the inner wall surface of the camera insertion groove; Optical fiber provided on one side in the illumination insertion groove and on the other side along a hollow portion in the shaft; one side is inserted in the injection tube insertion groove, and the other side is hollow in the shaft. A drug injection tube provided along the part; a case to which the other end of the shaft is connected; a shaft provided to the case, to which the wire is connected, and the wire is lifted or released, and the shaft And a drive device for rotating a cap fitted to the tip of the shaft.

Here, the camera insertion groove formed in the cap is formed so that the depth reaches the end of the penetration portion of the wire with reference to the diameter of the insertion portion, and the outer periphery of the longitudinal portion of the wire The surface is in close contact with the inner peripheral surface of the shaft.

Further, one side of the camera is formed to reach the insertion portion of the cap, and one side of the outer peripheral surface of the camera is in contact with and closely contacted with the inner peripheral surface of the shaft.

Alternatively, the camera is formed to have the same length as the head, the other side of the outer peripheral surface of the camera is aligned with the outer peripheral surface of the shaft, and the other side of the outer peripheral surface of the camera cable is the shaft. The inner surface is brought into contact with and closely contacted.

Further, the wire is configured such that the longitudinal portion is divided into a connecting portion and a first longitudinal portion, and one side of the connecting portion is integrally connected to the penetrating portion, and the other side of the connecting portion. Is fixedly and separably connected to the first longitudinal portion.

The camera cable and the optical fiber, after passing through the case, protrude to the outside of the case, have a central processing unit, and are connected to a control device connected to the input device and the display device. It is actuated by driving.

According to the present invention, a hole for injecting a camera, an optical fiber, a wire, and a drug can be formed in the shaft, and the diameter of the shaft can be minimized.

In particular, the camera, the optical fiber, and the tip of the drug injection tube are provided with a cap, and by inserting the wire into the cap, the tip of the camera, the optical fiber, and the drug injection tube are the same by driving the wire. Driven together, accurate internal imaging, light irradiation, and drug injection are performed.

Further, even if the camera does not have another connector, the camera can be firmly fitted into the cap and can be maintained fixed by the wire.

Moreover, installation is facilitated by connecting and attaching a camera, an optical fiber, and a drug injection tube to the cap.

Furthermore, the cap can be easily separated by making the tip of the wire separable.

FIG. 1 is a schematic diagram showing an example of the use of a catheter for the treatment of intervertebral disc prolapse. FIG. 2 is a schematic cross-sectional view showing an embodiment of a conventional catheter. FIG. 3 is a cross-sectional view showing a cross section of a conventional catheter shaft. FIG. 4 is a schematic view showing an embodiment of the catheter according to the present invention. FIG. 5 is an exploded perspective view showing a cap attaching portion of the catheter according to the present invention. FIG. 6 is a cross-sectional view showing an embodiment of a camera in the present invention. FIG. 7 is a sectional view showing an embodiment of a camera in the present invention. FIG. 8 is an exploded perspective view showing one embodiment of the wire in the present invention. FIG. 9 is a perspective view showing a state before and after the cap is attached in the present invention. FIG. 10 is a schematic view showing a state where the control device is further connected in the present invention.

Hereinafter, a catheter using an optical fiber and a camera of the present invention will be described in detail with reference to the accompanying drawings.

The catheter of the present invention is large and includes a shaft 10, a cap 20, a wire 30, a camera 40, a camera cable 41, a drug injection tube 50, an optical fiber 60, a case 70, and a driving device 80. .

As shown in FIGS. 4 and 5, the shaft 10 has a hollow portion 11 formed therein along the longitudinal direction, is a flexible material, and is formed in a cylindrical shape.

The cap 20 is a main component in the present invention, and as shown in FIGS. 4 and 5, a head portion 21 having an outer diameter that is the same as the outer diameter of the shaft 10, and the head portion. 21 includes an insertion portion 22 that is integrally connected to one side, has an outer diameter that is the same as the inner diameter of the shaft 10, and is fitted to the inner peripheral surface of the shaft 10.

The outer diameter of the head portion 21 can be slightly larger than the outer diameter of the shaft 10, but it is desirable to form the head portion 21 identically.

As shown in the figure, such a cap 20 has a “U” -shaped cross section from the end of the head portion 21 to the end of the insertion portion 22 and is directed toward the center of the insertion portion 22. Recessed camera insertion groove 23 is provided.

As shown in FIG. 6, such a camera insertion groove 23 has a depth (a) of 1/2 to 2/3 of the diameter (b) of the insertion portion 22 when the insertion portion 22 is used as a reference. It is desirable to become.

Further, both ends of the cap 20 communicate with the outer peripheral surface of the insertion portion 22, the inside communicates with the camera insertion groove 23, forms a straight line across the center of the insertion portion 22, and the head portion 21. A wire insertion hole 26 is formed so as to be spaced from the end of the wire.

In addition, wire guide grooves 27 that are recessed inward are formed from both side ends of the wire insertion hole 26 to the end portion of the insertion portion 22.

In addition, as shown in the figure, the cap 20 has a “U” -shaped cross section from the end of the head portion 21 to the end of the insertion portion 22, and the illumination insertion groove 25 recessed inward. And the injection tube insertion groove 24 are spaced apart from each other.

As shown in the figure, the wire 30 includes a through portion 31 provided through the wire insertion hole 26 and a longitudinal direction formed along the wire guide groove 27 while being connected to the through portion 31. Part 32.

Here, it is desirable that the outer peripheral surface of the longitudinal portion 32 abuts on the inner peripheral surface of the shaft 10 or is separated from the inner peripheral surface.

The camera 40 is inserted into the camera insertion groove 23, and as shown in FIGS. 6 and 7, one end of the camera 40 is aligned with the end of the head portion 21 on the end surface.

The other side is inserted so that the end portion does not reach the wire insertion hole 26.

Thus, the other end portion of the camera 40 is locked to the through portion 31 of the wire 30 and is prevented from moving into the shaft 10.

Further, the camera 40 is configured such that one side of the outer peripheral surface abuts on the inner wall surface on the center side of the camera insertion groove 23 to prevent the flow in the camera insertion groove 23.

As shown in the figure, the camera cable 41 is connected to the camera 40 and formed smaller than the diameter of the camera 40, and is attached to the inner wall surface of the camera insertion groove 23. A space 42 is provided.

Thus, it is very important to provide the wire attachment space 42.

When the diameter of the camera 40 is larger than the diameter of the entire shaft 10 and one side of the outer peripheral surface of the camera 40 exceeds the center of the shaft 10, a wire 30 for driving the shaft 10 is usually installed. I can't do that.

In particular, when fixing the wire 30 to both sides of the shaft 10, the portions to which the wire 30 is connected must be opposite to each other with respect to the end face of the shaft 10, but when the size of the camera 40 increases, 2 When the two wires 30 are connected to each other in the shaft 10, they cannot be positioned in exactly the opposite directions.

That is, when installing a camera 40 having a large size, the wire 30 must use two different wires 30, and the cable and the drug of the camera 40 are injected into the outside of the wire 30 within the narrow shaft 10. When a tube, a tube for providing illumination, and the like are provided, interference occurs with each other in the process in which the shaft 10 is bent by driving the wire 30, so that a smooth operation is not performed.

However, as in the present invention, by providing a difference in the diameters of the camera 40 and the camera cable 41, at first glance, the wire 30 passes through the camera insertion groove 23, thereby preventing an increase in the diameter of the shaft 10. In the step between the camera 40 and the camera cable 41, the wire 30 is locked to maintain a firm connection between the wire 30 and the cap 20, and the camera 40 is pulled into the shaft 10. Phenomenon can be prevented.

In the above configuration, it can be said that the camera 40 has a lens and the camera cable 41 is provided for controlling the operation of the camera 40.

As shown in FIGS. 4 and 5, one side of the optical fiber 60 is inserted into the illumination insertion groove 25, and the other side is provided along the hollow portion 11 in the shaft 10.

The optical fiber 60 irradiates light from the tip of the shaft 10 so that smooth shooting can be performed by shooting with the camera 40, and is desirable as the optical fiber 60 itself, but a tube having an LED lamp at the tip is used. It can also be used.

The optical fiber 60 is preferably made of a flexible material and is provided with a light source at the end.

As shown in the figure, the drug injection tube 50 has one side inserted into the injection tube insertion groove 24 and the other side provided along the hollow portion 11 in the shaft 10.

The other end of the shaft 10 is connected to the case 70, and a driving device 80 to which the wire 30 is connected is provided in the case 70.

The wire 30 is connected to the driving device 80, and the wire 30 is lifted or released, and the tip of the shaft 10 and the cap 20 fitted to the tip of the shaft 10 are rotated.

As shown in the figure, the driving device 80 is rotatable in the clockwise direction and the counterclockwise direction with respect to the central rotating shaft, and a spring is selectively provided on the rotating shaft. After the rotation in one side direction, it can be rotated to the original position.

The wires 30 are fixed to the left and right sides of the drive device 80, respectively. When the drive device 80 is rotated left and right, the wire 30 is wound around the drive device 80.

In such an example, as the driving device 80 is rotated to the left and right, the wires 30 on both sides are respectively lifted or released to be loosened and the shaft 10 can be rotated to the left and right.

The drive device 80 in the present invention is not limited to the above example, and various conventionally known drive devices 80 can be applied.

In the above-described configuration, the camera insertion groove 23 formed in the cap 20 has a depth of the wire 30 with the depth based on the diameter of the insertion portion 22 as shown in FIGS. It is formed so as to reach the end of the penetrating portion 31, and the outer peripheral surface on one side of the wire 30 is in close contact with the inner wall surface of the camera insertion groove 23, and the camera cable 41 is in close contact with the wire 30, thereby maximizing space utilization. In other words, the operation of the driving device 80 allows the cap 20 in close contact with the wire 30 to move immediately and without bending.

Further, as shown in the figure, the outer peripheral surface of the longitudinal portion 32 of the wire 30 is in close contact with the inner peripheral surface of the shaft 10, and the tip portion of the shaft 10 is immediately brought up by the lifting of the wire 30. With this, you can make the exercise of bending together.

On the other hand, as shown in FIG. 6, the diameter of the camera 40 is formed so that one side of the camera 40 reaches the insertion portion 22 of the cap 20, and one side of the outer peripheral surface of the camera 40 is inside the shaft 10. As shown in FIG. 7, the camera 40 is formed to have the same length as the head portion 21, and the other side of the outer peripheral surface of the camera 40 is The outer peripheral surface of the shaft 10 may be in a straight line, and the other outer peripheral surface of the camera cable 41 may be in contact with and closely contact the inner peripheral surface of the shaft 10.

In the case of FIG. 7, the size of the camera 40 can be made larger than that of FIG.

In the case of FIG. 6, the distance between the tip of the camera 40 and the wire 30 can be reduced or brought into contact with each other to prevent the camera 40 from being pulled into the shaft 10.

On the other hand, as shown in FIG. 8, the wire 30 has a longitudinal portion 32 divided into a coupling portion 32a and a first longitudinal portion 32b, and the coupling portion 32a has one side penetrating therethrough. The other end of the connecting portion 32a is connected to the first longitudinal portion 32b so as to be fixed and separable.

As a method for this, the connecting portion 32a can be formed in a tubular shape, and the first longitudinal portion 32b can be fitted to the tubular portion. When trying to separate the cap 20 for repair or cleaning, it can be easily separated.

In the catheter of the present invention configured as described above, the camera cable 41 and the optical fiber 60 project outside the case 70 after passing through the case 70, as shown in FIG. A processing device is provided, is connected to a control device 90 connected to an input device 91 and a display device 92, and is operated by driving the control device 90.

FIG. 10 shows an example in which another view box is configured by the control device 90 and is connected to a notebook PC having a keyboard and a screen using a USB cable or the like. In this case, FIG. The user is controlled by a program stored in the notebook PC, and the mechanical control is controlled by the view box.

However, the configuration of the control device 90 is not limited to the above example, and various known control and communication techniques can be used.

Further, in the above-described configuration, the camera insertion groove 23, the illumination insertion groove 25, and the injection tube insertion groove 24 are formed in a groove shape without being formed in a hole shape that is cut off from the outside, so that the camera 40 and the optical fiber 60 are formed. The attachment / separation of the drug injection tube 50 becomes easier.

Needless to say, the catheter of the present invention configured as described above can be illuminated and photographed, and the shaft 10 can be rotated. Furthermore, the camera 40, the optical fiber 60, the wire 30, and the drug infusion tube Despite the provision of 50, the diameter can be minimized.

Industrial applicability

INDUSTRIAL APPLICABILITY The present invention can be applied to various endoscopic operations, and can exhibit more excellent effects particularly when used for the treatment of lumbar disc prolapse.

10: shaft 11: hollow portion 20: cap 21: head portion 22: insertion portion 23: camera insertion groove 24: injection tube insertion groove 25: illumination insertion groove 26: wire insertion hole 27: wire guide groove 30: wire 31: penetration Part 32: Longitudinal part 32a: Connection part 32b: First longitudinal part 40: Camera 41: Camera cable 42: Wire mounting space 50: Drug injection tube 60: Optical fiber 70: Case 80: Drive device 90: Control device 91: Input device 92: display device

Claims (6)

In the catheter,
A hollow portion (11) is formed inside along the longitudinal direction,
A cylindrical shaft (10) made of a flexible material;
A head portion (21) whose outer diameter is the same as the outer diameter of the shaft (10) is integrally connected to one side of the head portion (21), and the outer diameter of the shaft (10) is integrated. The insertion portion (22) has the same size as the inner diameter and is fitted to the inner peripheral surface of the shaft (10), and the end of the insertion portion (22) extends from the end of the head portion (21). The cross-sectional shape is “U” -shaped up to the portion and is recessed toward the center of the insertion portion (22), and the depth of the insertion portion (22) is based on the diameter of the insertion portion (22). A camera insertion groove (23) that reaches 1/2 to 2/3 of the diameter is formed, both ends communicate with the outer peripheral surface of the insertion portion (22), and the inside communicates with the camera insertion groove (23). A wire insertion hole (26) is formed that is aligned with the center of the insertion portion (22) and is spaced from the end of the head portion (21). Inwardly recessed wire guide grooves (27) are formed from both side ends of the hole (26) to the end of the insertion portion (22), and from the end of the head portion (21) to the insertion portion (22). Each of the caps has a U-shaped cross-section up to the end, and the illumination insertion groove (25) and the injection tube insertion groove (24) that are recessed inwardly are respectively formed while being separated from each other ( 20) and
A penetration part (31) provided through the wire insertion hole (26) and a wire guide groove (27) formed while being connected to the penetration part (31), and an outer peripheral surface of the shaft ( 10) a wire (30) having a longitudinal part (32) provided in contact with or spaced from the inner peripheral surface;
Inserted into the camera insertion groove (23), one end is aligned with the end of the head portion (21), and the other side is inserted so as not to reach the wire insertion hole (26). One side is a camera (40) that contacts the inner wall surface on the center side of the camera insertion groove (23), and
A camera cable (41) connected to the camera (40), formed smaller than the diameter of the camera (40), and forming a wire attachment space (42) with the inner wall surface of the camera insertion groove (23). )When,
One side is inserted into the illumination insertion groove (25), and the other side is an optical fiber (60) provided along the hollow portion (1) in the shaft (10);
One side is inserted into the injection tube insertion groove (24), and the other side is a drug injection tube (50) provided along the hollow portion (11) in the shaft (10),
A case (70) to which the other end of the shaft (10) is connected;
The case (70) is connected to the wire (30), and the wire (30) is lifted up or released, and fitted to the tip of the shaft (10) and the tip of the shaft (10). A catheter using an optical fiber and a camera, wherein the catheter includes a driving device (80) for rotating the cap (20). The camera insertion groove (23) formed in the cap (20) has a depth reaching the end of the penetration part (31) of the wire (30), with the depth being based on the diameter of the insertion part (22). Formed,
The optical fiber and camera according to claim 1, wherein the outer peripheral surface of the longitudinal portion (32) of the wire (30) is in contact with and in close contact with the inner peripheral surface of the shaft (10). catheter. One side of the camera (40) is formed to reach the insertion part (22) of the cap (20),
The catheter using an optical fiber and a camera according to claim 2, wherein one side of the outer peripheral surface of the camera (40) is brought into contact with and closely contacted with the inner peripheral surface of the shaft (10). The camera (40) is formed to have the same length as the head portion (21),
The other side of the outer peripheral surface of the camera (40) is aligned with the outer peripheral surface of the shaft (10),
The catheter using an optical fiber and a camera according to claim 2, wherein the other side of the outer peripheral surface of the camera cable (41) is in contact with and closely contacts the inner peripheral surface of the shaft (10). The wire (30) has a longitudinal part (32) divided into a connecting part (32a) and a first longitudinal part (32b),
One side of the connecting part (32a) is integrally connected to the penetrating part (31),
The catheter using an optical fiber and a camera according to claim 3 or 4, wherein the other side of the connecting portion (32a) is connected to the first longitudinal portion (32b) so as to be fixed and separable. The camera cable (41) and the optical fiber (60) pass through the case (70), and then protrude to the outside of the case (70). The camera cable (41) and the optical fiber (60) are provided with a central processing unit, and include an input device (91) and a display device ( The catheter using an optical fiber and a camera according to claim 3 or 4, wherein the catheter is connected to a control device (90) connected to 92) and is operated by driving of the control device (90).

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